For the NDB, if the blue line isn’t showing, click on the “PFD opt” softkey
Then click on the “bearing 1” or “bearing 2” softkey a couple of times, or until it displays “ADF” (with the freq next to it), and the blue line will show up. The only real difference between bearing 1 and 2 is the arrow is slightly different, but they’re the same functionally. The bearing softkey will cycle through Nav 1/Nav 2/ADF/GPS so you can just keep pushing it if you miss the one you want.
Regards